Few more questions- adblock and other

Hi, I have installed adblock, the way it was described on this forum and sadly not everything gets blocked, tbh most of the ads are not blocked at all, nor I get an option to add filters when zoom over a banner- am I doing something wrong? Opening new tabs: when you use third mouse button: not every time you click new tab gets opened and then if it does open it shows in random place, not next to the tab from which you have attempted to open new tab- where is the setting to change that?